public class Test {
    public static String myToString(int[] array){
        String ret="[";

        for (int i=0;i< array.length;i++){
            ret+=array[i];
            if (i< array.length-1){
              ret+=",";
            }
        }

        ret+="]";
        return ret;
    }

    public static void main(String[] args) {
        int[] array={1,2,3,4,5};
        String ret=myToString(array);
        System.out.println(ret);
    }
}
